Why did this happen to me?

I played a game in which I won: https://lichess.org/6zH2hAystAck

I was the one who lost the points. Why?

Open it and see for yourselves!!!

You didn't win, it was a draw. This would've been a win on time if there was any mating material left on the board, but you had a bare king. ½-½ means draw (sharing the point), and you lost points because you were higher-rated.

Oh! Thanks.